package com.lijian.shiro.realm;

import com.lijian.shiro.entity.User;
import com.lijian.shiro.service.UserService;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @Author: LiJian
 * @CreateTime: 2024-12-26
 * Description:
 */

@Component
public class MyRealm extends AuthorizingRealm {
    @Autowired
    private UserService userService;

    //自定义授权方法 获取当前登录用户权限信息，返回给 Shiro 用来进行授权对比
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("进入自定义授权方法"); //获取当前用户身份信息
        String principal = principalCollection.getPrimaryPrincipal().toString();
        //调用接口方法获取用户的角色信息
        List<String> roles = userService.getUserRoleInfo(principal);
        System.out.println("当前用户角色信息："+roles);
        //调用接口方法获取用户角色的权限信息
        List<String> permissions = userService.getUserPermissionInfo(roles);
        System.out.println("当前用户权限信息："+permissions);
        //创建对象，存储当前登录的用户的权限和角色
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //存储角色
        info.addRoles(roles);
        //存储权限信息
        info.addStringPermissions(permissions);
        //返回
        return info;
    }

    //自定义登录认证方法
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        //1 获取用户身份信息
        String name = token.getPrincipal().toString();
        //2 调用业务层获取用户信息（数据库中）
        User user = userService.getUserInfoByName(name);
        //3 判断并将数据完成封装
        if(user!=null){
        AuthenticationInfo info = new SimpleAuthenticationInfo(token.getPrincipal(), user.getPwd(),
                ByteSource.Util.bytes("salt"), token.getPrincipal().toString());
        return info;
    }
    return null;
  }
}

